Haven't tried it yet, but maybe I could suggest one or two improvements

- have it register 1 (or more) "accepted simcard numbers" and check the phone number of the simcard at boot, auto-sending an sms to both control phones if the detected simcard is "not allowed". I think this would be the main feature if you're to use it as an anti-theft app, otherwise the thief could just put his simcard in the device and you would have no way to use the software 'cause you don't know the thief's phone number

- investigate on how to turn gps on from your app... I know it can be done for there are apps around already doing it (must have root access though). This could be a nice plus for the gps tracking feature

In the meantime, grats for what seems to be a promising app
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